AU2002352020A8 - Early-late synchronizer having reduced timing jitter - Google Patents

Early-late synchronizer having reduced timing jitter

Info

Publication number
AU2002352020A8
AU2002352020A8 AU2002352020A AU2002352020A AU2002352020A8 AU 2002352020 A8 AU2002352020 A8 AU 2002352020A8 AU 2002352020 A AU2002352020 A AU 2002352020A AU 2002352020 A AU2002352020 A AU 2002352020A AU 2002352020 A8 AU2002352020 A8 AU 2002352020A8
Authority
AU
Australia
Prior art keywords
early
sample
interpolated
signal
control signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2002352020A
Other versions
AU2002352020A1 (en
Inventor
Bruno Melis
Andrea Finotello
Alfredo Ruscitto
Donato Ettorre
Maurizio Graziano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics SRL
Telecom Italia SpA
Original Assignee
STMicroelectronics SRL
Telecom Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STMicroelectronics SRL, Telecom Italia SpA filed Critical STMicroelectronics SRL
Publication of AU2002352020A8 publication Critical patent/AU2002352020A8/en
Publication of AU2002352020A1 publication Critical patent/AU2002352020A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A device for maintaining fine alignment between an incoming spread spectrum signal and a locally generated code in a digital communication receiver comprises: a delay line for storing a plurality of consecutive samples (E-1, E, M, L, L+1) of the incoming spread spectrum signal; three digitally controlled interpolators for determining by interpolation between consecutive samples an interpolated early sample, an interpolated middle sample, and an interpolated late sample; two correlators for calculating an error signal as the difference between the energy of the symbols computed from the interpolated early and late samples; a circuit for generating a control signal for controlling the interpolation phase of the digitally controlled interpolator for the early sample, and a digital non-linear filter, for smoothing the control signal of the interpolator for the early sample, enabling the update operation of the control signal only when the absolute value of the error signal at a time instant n is smaller than the absolute value of the same error signal at a time instant n-1.
AU2002352020A 2002-11-15 2002-11-15 Early-late synchronizer having reduced timing jitter Abandoned AU2002352020A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2002/012814 WO2004047327A1 (en) 2002-11-15 2002-11-15 Early-late synchronizer having reduced timing jitter

Publications (2)

Publication Number Publication Date
AU2002352020A8 true AU2002352020A8 (en) 2004-06-15
AU2002352020A1 AU2002352020A1 (en) 2004-06-15

Family

ID=32319523

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002352020A Abandoned AU2002352020A1 (en) 2002-11-15 2002-11-15 Early-late synchronizer having reduced timing jitter

Country Status (10)

Country Link
US (1) US7515670B2 (en)
EP (1) EP1561287B1 (en)
JP (1) JP4183683B2 (en)
CN (1) CN100452669C (en)
AT (1) ATE426952T1 (en)
AU (1) AU2002352020A1 (en)
BR (1) BR0215941A (en)
CA (1) CA2509189A1 (en)
DE (1) DE60231754D1 (en)
WO (1) WO2004047327A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100547786B1 (en) * 2003-08-09 2006-01-31 삼성전자주식회사 Timing error detection method and apparatus in mobile communication system
GB2410162B (en) * 2004-01-16 2005-12-21 Compxs Uk Ltd Spread spectrum acquisition
KR100619021B1 (en) * 2004-05-24 2006-08-31 삼성전자주식회사 Method and apparatus for restoring audio error data and digital audio signal processor using thereof
CN101116255B (en) * 2004-12-03 2012-07-04 Nxp股份有限公司 Managing tap positions in a digital delay line and method thereof
CN101095291B (en) * 2004-12-28 2011-11-02 Nxp股份有限公司 Fine time tracking with improved resolution
JP5176545B2 (en) * 2005-09-28 2013-04-03 日本電気株式会社 Signal measuring device
US7804917B2 (en) * 2005-11-07 2010-09-28 Sigma Designs, Inc. Clear channel assessment method and system for ultra wideband OFDM
US8031816B2 (en) * 2006-07-17 2011-10-04 Mediatek Inc. Method and apparatus for determining boundaries of information elements
US9509366B2 (en) * 2007-04-04 2016-11-29 Via Technologies, Inc. Interference estimation circuit and method
KR100937602B1 (en) * 2007-12-13 2010-01-20 한국전자통신연구원 Human body communication system and communication method thereof
US20130142060A1 (en) * 2010-02-26 2013-06-06 Qualcomm Incorporated Instantaneous noise normalized searcher metrics
CN103457680B (en) * 2013-08-20 2016-05-11 重庆邮电大学 Timing Synchronization error detection method based on digital reception in satellite communication
CN103840803B (en) * 2013-12-04 2017-01-04 中国航空工业集团公司第六三一研究所 A kind of implementation method of discrete magnitude dither mask
US9379880B1 (en) * 2015-07-09 2016-06-28 Xilinx, Inc. Clock recovery circuit
US10014026B1 (en) * 2017-06-20 2018-07-03 Seagate Technology Llc Head delay calibration and tracking in MSMR systems

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI99181C (en) * 1994-08-16 1997-10-10 Nokia Mobile Phones Ltd Receiver
US6330273B1 (en) * 1996-03-28 2001-12-11 Roke Manor Research Limited Apparatus for code tracking in a direct sequence spread spectrum receiver
US6201828B1 (en) * 1998-11-12 2001-03-13 Nortel Networks Limited Fine estimation of multipath delays in spread-spectrum signals
US7184457B2 (en) * 2000-02-28 2007-02-27 Texas Instruments Incorporated Spread spectrum path estimation
US7010073B2 (en) * 2001-01-19 2006-03-07 Qualcomm, Incorporated Delay lock loops for wireless communication systems
US6456648B1 (en) * 2001-10-01 2002-09-24 Interdigital Technology Corporation Code tracking loop with automatic power normalization
US7154872B2 (en) * 2002-04-26 2006-12-26 Lucent Technologies Inc. Method and system for tracking and correcting timing errors in communication systems
US6795452B2 (en) * 2002-05-31 2004-09-21 Sandbridge Technologies, Inc. Method of tracking time intervals for a communication signal

Also Published As

Publication number Publication date
US7515670B2 (en) 2009-04-07
EP1561287B1 (en) 2009-03-25
CN1695314A (en) 2005-11-09
CN100452669C (en) 2009-01-14
EP1561287A1 (en) 2005-08-10
JP4183683B2 (en) 2008-11-19
ATE426952T1 (en) 2009-04-15
AU2002352020A1 (en) 2004-06-15
CA2509189A1 (en) 2004-06-03
JP2006506864A (en) 2006-02-23
DE60231754D1 (en) 2009-05-07
BR0215941A (en) 2005-09-06
WO2004047327A1 (en) 2004-06-03
US20060251154A1 (en) 2006-11-09

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase
TH Corrigenda

Free format text: IN VOL 18, NO 27, PAGE(S) 7467 UNDER THE HEADING APPLICATIONS OPI - NAME INDEX UNDER THE NAME TELECOM ITALIA S.P.A., APPLICATION NO. 2002352020, UNDER INID (71) CORRECT THE NAME TO READ STMICROELECTRONICS S.R.L.; TELECOM ITALIA S.P.A.